Insecticide



UNITED STATES PATENT Oiuucn,

JAMES ARTHUR PALETHORPE, OF LIVERPOOL, ENGLAND, ASSIGNOR TO THE TOBACCO WVAREHOUSING AND TRADING COMPANY, OF DAN- VILLE, VIRGINIA.

iNSECTlCIDE.

SPECIFICATION forming part of Letters Patent No. 596,761, dated January 4, 1898.

Application filed April 8, 1897. Serial No, 631,257. (No specimens.)

To all whom it may. concern.-

Be it known that I, JAMES ARTHUR PALE- THORPE, a subject of the Queen of Great Britain, and a resident of Liverpool, En gland,have invented a certain new and useful Insecticide, of which the following is a specification.

My invention relates to an insect-powder containing a volatile poison which may be driven ed by means of a small lamp or other convenient source of heat or which may be used in other ways.

The poisonous ingredient of my improved article of manufacture is nicotine. This is obtained by making a decoction'of the tobacco plant and maybe obtained from the stems or other discarded portions of the leaf or from the leaf, as may be desired. The principal bulk of the insecticideor the vehicle is kieselguhr, which is an infusorial silicious earth, and this is impregnated with the solution, or the liquid nicotine may be absorbed by an equivalent inert absorbent and refractory powder. The article thus prepared may be used by evaporating or driving off the nicotine by the application of heat from any convenient source.

The convenience of using nicotine in such a concentrated form is very great, inasmuch as a very few ounces of the powder prepared as above are quite as efficacious as several hundred pounds ottobacco itself, for when tobacco is burned for fumigating only a very small portion of the nicotine present in the tobacco is volatilized, nearly the whole of it being decomposed by the high temperature necessary to fire the tobacco.

Having now described my invention, What I claim as new therein, and desire to secure by Letters Patent, is 1 As a new article of manufacture, an insecticide consisting of powdered kieselguhr impregnated with a decoction of nicotine, in substantially the manner explained.

J. ARTHUR PALETHORPE.

Witnesses:

J. A. PADLEY, R. THOMPSON, J r. 

